كتاب الحج
15  
The Book of Pilgrimage
(7)
Chapter: It is recommended to apply perfume just before entering Ihram, and it is recommended to use Musk, and it does not matter if its glistening traces remain
(7)
باب الطِّيبِ لِلْمُحْرِمِ عِنْدَ الإِحْرَامِ ‏
Sahih Muslim 1189 c

'A'isha (Allah be pleased with her) reported:

I used to apply perfume to the Messenger of Allah (ﷺ) before his entering upon the state of Ihram and at the conclusion of it, before circumambulating the House (for Tawaf Ifada).
وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْقَاسِمِ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، - رضى الله عنها - أَنَّهَا قَالَتْ كُنْتُ أُطَيِّبُ رَسُولَ اللَّهِ صلى الله عليه وسلم لإِحْرَامِهِ قَبْلَ أَنْ يُحْرِمَ وَلِحِلِّهِ قَبْلَ أَنْ يَطُوفَ بِالْبَيْتِ ‏.‏
Reference : Sahih Muslim 1189c
In-book reference : Book 15, Hadith 36
USC-MSA web (English) reference : Book 7, Hadith 2682
  (deprecated numbering scheme)